Fix build warning and remove docker pull explicitly

[hzxuzhonghu]

What type of PR is this?

What this PR does / why we need it:

Which issue(s) this PR fixes:
Fixes #

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Does this PR introduce a user-facing change?:

[hzxuzhonghu]

/cherry-pick release-0.5

[kmesh-bot]

@hzxuzhonghu: once the present PR merges, I will cherry-pick it on top of release-0.5 in a new PR and assign it to you.

In response to this:

/cherry-pick release-0.5

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 52.98%. Comparing base (e816990) to head (20cb06f).
Report is 18 commits behind head on main.

see 13 files with indirect coverage changes

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[kwb0523]

/lgtm

[nlgwcy]

/lgtm
/approve

[kmesh-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: nlgwcy

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[kmesh-bot]

In response to a cherrypick label: new pull request created: #897